Air leak detector

Details Air leak detector Air leak detector

1974-11-15

1976-02-03

Cohan, Alan

Fluid handling

Diverse fluid containing pressure systems

Fluid separating traps or vents

128214E, 128DIG13, 340237R, 356181, 356 39, 250573, A61M 514, G08B 2100

Patent

active

039358763

ABSTRACT:
A device for detecting the presence of air bubbles within a fluid-carrying tube, for example a blood tube used in medical procedures. The tube is placed between a light source and an optical sensor which produces signals when bubbles pass through the tube. These signals are integrated and a switch changes state when the integration reaches a predetermined value. The detector thus responds to a predetermined quantity of air, either by a large air bubble or an accumulation of small air bubbles. In a preferred embodiment, the switch releases a springloaded clamp which pinches off the tube when an excessive amount of air is detected.

REFERENCES:
patent: 2835252 (1958-05-01), Mauchel
patent: 3163176 (1964-12-01), Darling
patent: 3812482 (1974-05-01), Clark

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